The Puron Refrigerant (R-410A) come in a single pack of electrical cooling or gas heating rooftop units with increased efficiency. It can hold up to 30 – 100 nominal tons. It comes in four types - 48P5 (Horizontal VAV), 48P2 (Vertical CV), 48P4 (Horizontal CV) and 48P3 (Vertical VAV). In heating and cooling modes, the rooftop units are factory tested and pre-wired. An industry grade cabinet is standard in all the 48P models with completely dependent panels. For increased performance of fans up to 4-inch ESP, fans that are curved forward are provided. Airfoil fans for supply with an ESP up to 6-inch are provided optionally. Units comes in return airflow models or horizontal/vertical models for air volume that is staged - SAV, constant volume – CV and air volume that is variable – VAV applications. They also come in a wide range of gas heating varieties.